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MongoDB C100DBA Exam Syllabus Topics:

Section	Objectives
Backup, Restore, and Operations	- Backup strategies and tools - Restore procedures - Monitoring and maintenance
Replication and High Availability	- Failover and elections - Read/write concerns - Replica set architecture
Security	- Authentication and authorization - Role-based access control (RBAC) - Encryption at rest and in transit
Aggregation Framework	- Aggregation pipeline stages - Data transformation and grouping - Aggregation operators
MongoDB CRUD Operations	- Working with documents and BSON types - Querying and filtering documents - Insert, update, and delete operations
Data Modeling	- Schema design principles - Embedding vs referencing - Relationships in MongoDB
Indexing and Performance Tuning	- Query performance optimization - Explain plans and diagnostics - Index types and usage
Sharding and Scalability	- Shard keys and distribution strategy - Balancing and scaling operations - Sharded cluster architecture

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MongoDB Certified DBA Associate Exam (Based on MongoDB 4.4) Sample Questions (Q167-Q172):

NEW QUESTION # 167
Which of the following index would be optimum for the query?
Select all valid. db.test.find( { a : 5, c : 2 })

A. db.test.ensurelndex( { a: 1, b :1, c:l, d:l})
B. db.test.ensurelndex( { a : 1, c: 1, d: 1, b : 1})
C. db.test.ensurelndex( { c:l, a: 1})
D. CH db.test.ensurelndex( { a :1, c:l})

Answer: B,D

NEW QUESTION # 168
Below is a sample document of "orders" collection

Answer:

Explanation:
$project

NEW QUESTION # 169
Update If Correct is an approach for which of the following concepts in MongoDB:

A. Transaction Management
B. Atomicity
C. Performance Management
D. Concurrency Control

Answer: D

NEW QUESTION # 170
What is the purpose of enabling TLS?

A. To ensure high availability of the database.
B. To provide encryption of data in transit.
C. To improve query performance.
D. To automate backup and restore operations.

Answer: B

Explanation:
Transport Layer Security protects MongoDB network communications while data travels between clients and servers and, when configured, between MongoDB deployment members. Its core purpose is therefore encryption of data in transit. TLS helps prevent passive interception and tampering and also supports certificate-based identity validation. It is separate from encryption at rest, which protects files on storage media, and separate from Queryable Encryption or client-side field encryption, which protects selected application data before it reaches the server. Option A is unrelated: backup and restore operations use snapshot, managed backup, or database-tool mechanisms. Option B describes the objective of replication, elections, and redundant deployment architecture, not TLS. Option C is also incorrect; TLS is a security control, not a query-optimization mechanism, and cryptographic processing can add some overhead rather than improving query execution. A secure MongoDB deployment normally combines TLS with strong authentication, least-privilege authorization, appropriate network exposure controls, auditing, and storage or field-level encryption as required. For the specific question, enabling TLS provides encryption for data moving across the network, making option D correct.
Study Guide reference/topic:Security, Networking, and Encryption - TLS/SSL, transport encryption, certificates, and network security.

NEW QUESTION # 171
Which of the following are common uses of the mongo shell? Check all that apply

A. Use as a JavaScript framework for your production system
B. Perform queries against MongoDB collections
C. Perform administrative tasks

Answer: B,C

NEW QUESTION # 172
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